topicOral Collagen Skin Hydration Meta-Analysis
claimNo significant difference in hydration between the 2 groups;CP significantly increased both firmness and elasticity (p < 0.001 for both).
evidence level4
citationLei Dongyun (2026)
sourceInfluence of Oral Collagen Peptides on Skin Biophysical Properties in Humans: A Narrative Review
topicOral Collagen Skin Hydration Meta-Analysis
claimp p p CP increased elasticity at the end of the study (= 0.017) and 4 weeks after the end of the study (p = 0.027):CP increased skin hydration (< 0.001) at the end of the study;CP decreased skin roughness elasticity at the end of the study and 4 weeks after the end of the study (< 0.001).
evidence level4
citationLei Dongyun (2026)
sourceInfluence of Oral Collagen Peptides on Skin Biophysical Properties in Humans: A Narrative Review
topicOral Collagen Skin Hydration Meta-Analysis
claimCP reduced eye wrinkle volume by 20% (p < 0.05) in addition to increase procollagen type I (65%) and elastin (18%).
evidence level4
citationLei Dongyun (2026)
sourceInfluence of Oral Collagen Peptides on Skin Biophysical Properties in Humans: A Narrative Review
topicOral Collagen Skin Hydration Meta-Analysis
claim1–3 4 5 6–8 9 10 11 Cutaneous function not only dominates the cosmetic appearance but also influences cutaneous and extracutaneous conditions.
evidence level4
citationLei Dongyun (2026)
sourceInfluence of Oral Collagen Peptides on Skin Biophysical Properties in Humans: A Narrative Review
topicOral Collagen Skin Hydration Meta-Analysis
claimHowever, the evidence regarding its effectiveness in supporting skin health and improving hair, nail, and wound-healing outcomes remains heterogeneous.
evidence level4
citationBiełach-Bazyluk A (2026)
sourceDietary Collagen Supplementation as a Strategy for Skin Health: A Narrative Review of Clinical Effects on Skin, Hair, Nails, and Wound Healing.
topicOral Collagen Skin Hydration Meta-Analysis
claimThe aim of this review is to summarize and critically evaluate the current human evidence on oral collagen supplementation and its potential role in supporting skin health, hair and nail quality, and wound healing.
evidence level4
citationBiełach-Bazyluk A (2026)
sourceDietary Collagen Supplementation as a Strategy for Skin Health: A Narrative Review of Clinical Effects on Skin, Hair, Nails, and Wound Healing.
topicOral Collagen Skin Hydration Meta-Analysis
claimCollagen-derived peptide supplementation has been associated with improvements in skin hydration, elasticity, wrinkle appearance, and dermal extracellular matrix organization, while also supporting hair thickness and strength, modestly enhancing nail growth, and promoting wound healing.
evidence level4
citationBiełach-Bazyluk A (2026)
sourceDietary Collagen Supplementation as a Strategy for Skin Health: A Narrative Review of Clinical Effects on Skin, Hair, Nails, and Wound Healing.
topicOral Collagen Skin Hydration Meta-Analysis
claimCollagen is a key structural protein of the skin, essential for maintaining its mechanical strength, elasticity, and hydration.
evidence level4
citationBiełach-Bazyluk A (2026)
sourceDietary Collagen Supplementation as a Strategy for Skin Health: A Narrative Review of Clinical Effects on Skin, Hair, Nails, and Wound Healing.